Quotables
"The idea that cavalry will be replaced by these iron coaches is absurd. It is little short of treasonous."
Aide-de-camp to Field Marshal Haig ; At a tank demonstration, 1916
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8054088 | Passive intermodulation test apparatus A portable test apparatus for conducting a plurality of tests on a communications device is provided. The unit can include a control panel, which can include at least one display for displaying test information from the device under test. The apparatus can also incl... | 11/08/2011 |
| 8026728 | Spectrum analyzers with dynamic range indicator and methods of use An apparatus for measuring spectral components of a signal is described. The apparatus comprises a measurement acquisition unit configured to receive an input signal and to provide a measurement trace. The apparatus also comprises a model module configured to model ... | 09/27/2011 |
| 7313492 | Method and device for increasing the dynamic range and measuring accuracy of a measuring device for spectrum and/or network analysis A method and a device for increasing the dynamic range and measuring accuracy of a measuring device for spectrum and/or network analysis images a high-frequency electronic signal within a frequency range into at least two spectra through a first frequency translatio... | 12/25/2007 |
| 7265557 | Method and circuit for measuring characteristic parameters of intermodulation distortion An arrangement is for measuring characteristic parameters of intermodulation distortion of a device under test. The arrangement may include a generator of at least two tones at different test frequencies, and an attenuation path feeding the device with a replica of ... | 09/04/2007 |
| 7208955 | Power relay or switch contact tester Embodiments of the invention include a test circuit having an auxiliary low power test signal generator, filters, and a detector to test a power switch. The generator sends an auxiliary low power test signal having a different frequency than a power signal for the s... | 04/24/2007 |
| 7177599 | Line quality characteristic evaluation system A line quality characteristic evaluation system for estimating a line quality characteristic under an interference environment including nonlinear interference for a wireless communication system including at least one interfering wireless line, including a line qua... | 02/13/2007 |
| 7155362 | Test device for signaling and waveform generation and monitoring A system for generating a signal for testing a relay is provided. The system includes a plurality of argument vector arrays, each defines a digital signal for testing the relay. Each of the argument vector arrays includes a plurality of argument vectors and each arg... | 12/26/2006 |
| 7123023 | Method and device for measuring intermodulation distortion A measuring device is provided for measuring intermodulation distortion of a measuring object. The measuring device includes a first signal generator which produces a first signal that is supplied to an input of a measuring object, a signal combining device having a... | 10/17/2006 |
| 7107011 | Interference measurement and evaluation system An interference measurement and evaluation system for accurately estimating an interference characteristic of a receiving side including nonlinear interference for a wireless communications system, having a transmission signal for wireless communication and an inter... | 09/12/2006 |
| 6963247 | Gain stabilization technique for narrow band integrated low noise amplifiers A resonant load circuit is disposed in an integrated circuit, where the resonant load circuit includes an integrated inductance in parallel with an integrated capacitance, and further includes a first integrated resistance Rs in series with one of the ind... | 11/08/2005 |
| 6909292 | Method for suppressing even order harmonics in a device that utilizes transconductors A method for calibrating a low pass filter is disclosed. The low pass filter comprises a plurality of transconductor cells. The method comprises generating a test signal to the low pass filter and suppressing even-order harmonics due to transistor mismatches within ... | 06/21/2005 |
| 6882947 | Discrete fourier transform (DFT) leakage removal A technique for measuring spectral components, such as noise and distortion, of a non-coherently sampled test signal containing at least one tone of known frequency includes modeling the spectral components of the at least one tone, including the effects of leakage,... | 04/19/2005 |
| 6836231 | Signal generator A signal generator controls power output on the basis of the output from a Δ-Σ modulator or oscillator. That output may be generated in real time by the modulator or oscillator and fed to a switch control logic unit which controls a power switching stage to output... | 12/28/2004 |
| 6717392 | Signal generator A signal generator controls power output on the basis of the output from a Δ-Σ modulator or oscillator. That output may be generated in real time by the modulator or oscillator and fed to a switch control logic unit which controls a power switching stage to output... | 04/06/2004 |
| 6646449 | Intermodulation detector for a radio receiver An intermodulation detector (11) that operates standalone or in parallel with a radio receiver (10) of a radio receiver system (100) including a receiver tuning logic module (12), and, in the case of operating standalone, provides signals conveying inform... | 11/11/2003 |
| 6622117 | EM algorithm for convolutive independent component analysis (CICA) In connection with blind source separation, proposed herein, inter alia, are: expectation-maximization equations to iteratively estimate unmixing filters and source density parameters in the context of convolutive independent component analysis where the ... | 09/16/2003 |
| 6229316 | Measuring method by spectrum analyzer A spectrum analyzer in which automatic setting of parameters such as band width is done by the analyzer without manual operator input and noise measurements are determined and displayed to the operator. This is accomplished by an input signal being suppli... | 05/08/2001 |
| 5748001 | Method and apparatus for fast response and distortion measurement A method and apparatus for fast response and distortion measurement of a signal transfer device. A computer processor generates a multitone test signal of predetermined duration and stores it in a memory. The test signal is read out, converted to analog f... | 05/05/1998 |
| 5534853 | Electronic apparatus for measuring the parameters of an oil transformer The invention relates to an electronic apparatus fastened on an oil transformer, which measures with precision, continuously and simultaneously the value of the temperature, of the level of the dielectric liquid contained in the transformer, of the pressu... | 07/09/1996 |
| 5475315 | Method and apparatus for fast response and distortion measurement A method and apparatus for fast response and distortion measurement of a signal transfer device. A computer processor generates a multitone test signal of predetermined duration and stores it in a memory. The test signal is read out, converted to analog f... | 12/12/1995 |
| 5420516 | Method and apparatus for fast response and distortion measurement A method and apparatus for fast response and distortion measurement of a signal transfer device. A computer processor generates a multitone test signal of predetermined duration and stores it in a memory. The test signal is read out, converted to analog f... | 05/30/1995 |
| 5133083 | Adjacent channel selectivity signal generator system In an adjacent channel measurement system, a desired channel signal and an adjacent channel signal are generated using a single signal generator. The output from this generator is modulated with a signal from an offset oscillator to produce a carrier and ... | 07/21/1992 |
| 4982606 | Fluid level sensor and controller A fluid level sensor for determining the amount of liquid in a container. Thin metal plates are placed parallely adjacent each other to form a capacitor cell coated with a non-hygroscopic film. The plates are mounted on the walls of the container containi... | 01/08/1991 |
| 4792751 | Apparatus for field testing the performance of a feedforward amplifier An apparatus for field testing a feedforward amplifier includes a source of an RF signal and a source of an audio frequency signal. Both of these signals are applied to the feedforward amplifier under test. A failure in one of the active elements in the f... | 12/20/1988 |
| 4774454 | Distortion measuring system method utilizing signal suppression A method for testing and measuring distortion in electrical devices is provided. For signal processing and carrying devices, a signal generator generates a signal having known phase, amplitude and frequency, which is provided both to a device under test a... | 09/27/1988 |
| 4648124 | Apparatus for locating passive intermodulation interference sources An apparatus for locating passive interference sources by using a pair of different RF signals in conjunction with an acoustic signal to generate intermodulation products in metal-to-metal junctions. The acoustic tagging technique utilizes a focused, high... | 03/03/1987 |
| 4344029 | Automatic IM distortion test selector An intermodulation test analyzer which automatically determines whether an SMPTE or CCIF intermodulation test is being conducted and switches its output accordingly is disclosed. This is accomplished by sensing the low frequency energy content of the test... | 08/10/1982 |
| 4274047 | Analyzer for nonlinear networks This application describes a method and apparatus for measuring the transmission characteristics of a class of nonlinear two-ports containing physically inseparable reactive networks, but which can be characterized by an equivalent network comprising inpu... | 06/16/1981 |
| 4273970 | Intermodulation distortion test Errors in test results are minimized in a test system (FIG. 1) employing digital data acquisition units (121) when measuring intermodulation distortion of a voice frequency communication facility (105) by employing a unique 3-tone test signal. To this end... | 06/16/1981 |
| 4246535 | Design method for linear amplifier A method of designing a linear rf amplifier comprising an output load impedance and an active device including the steps of (a) applying DC bias to the device, (b) applying two different frequency signals of an amplitude C, and (c) changing the value of t... | 01/20/1981 |
| 4088948 | Single tone technique for measuring IM distortion Third order IM distortion in a microwave repeater is measured in situ by applying a small amount of low frequency amplitude-modulation to the payload signal while at the same time adding a test-tone of fixed frequency and amplitude. At the repeator's outp... | 05/09/1978 |
| 4055948 | Solar thermal-radiation, absorption and conversion system The invention described herein is a Method and Process for the direct absorption of radiant solar-thermal energy by and within a radiant-heat absorbing fluid. More specifically, however, it is a total system for the direct absorption of radiant solar-ther... | 11/01/1977 |
| 4048559 | Method and apparatus for testing microwave repeaters for IM distortion Microwave repeaters and the like are tested for third-order IM distortion by applying two, swept-frequency test-tones to the repeater. The test-tones are offset by a fixed frequency difference δ. A detector circuit, connected to the output of the repeate... | 09/13/1977 |
| 4028622 | Selective intermodulation distortion measurement An improved noise loading arrangement and method are disclosed capable of measuring low intensity intermodulaton distortion products, such as introduced in the operation of individual wideband transmission repeaters. The improved arrangement and method al... | 06/07/1977 |
